* {{App|[[Wikipedia:Mathomatic|Mathomatic]]|General purpose Computer Algebra System written in C.|http://www.mathomatic.org/|{{Pkg|mathomatic}}}}

* {{App|[[Wikipedia:Mathomatic|Mathomatic]]|General purpose Computer Algebra System written in C.|http://www.mathomatic.org/|{{Pkg|mathomatic}}}}

* {{App|[[Wikipedia:Maxima (software)|Maxima]]|[[Wikipedia:Maple (software)|Maple]]/[[Wikipedia:Wolfram Mathematica|Mathematica]]-like program with a wxWidgets based frontend.|http://maxima.sourceforge.net/|{{Pkg|maxima}} {{Pkg|wxmaxima}}}}

* {{App|[[Wikipedia:Maxima (software)|Maxima]]|[[Wikipedia:Maple (software)|Maple]]/[[Wikipedia:Wolfram Mathematica|Mathematica]]-like program with a wxWidgets based frontend.|http://maxima.sourceforge.net/|{{Pkg|maxima}} {{Pkg|wxmaxima}}}}

* {{App|[[Wikipedia:PARI/GP|PARI/GP]]|Computer algebra system designed for fast computations in number theory.|http://pari.math.u-bordeaux.fr/|{{Pkg|pari}}}}

* {{App|[[Wikipedia:PARI/GP|PARI/GP]]|Computer algebra system designed for fast computations in number theory.|http://pari.math.u-bordeaux.fr/|{{Pkg|pari}}}}

−

* {{App|[[Sage]]|Algebra system similar to Maxima, but written in Python.|http://www.sagemath.org/|{{Pkg|sage-mathematics}}}}

* {{App|[[Wikipedia:Scilab|Scilab]]|Matlab alternative used for numerical computations, its syntax is not equivalent to that of Matlab, but it can be easily converted.|http://www.scilab.org/|{{AUR|scilab}}}}

+

* {{App|[[Sage]]|Mathematics software system, that combines many existing open-source packages into a common Python interface. Alternative to Magma, Maple, Mathematica and Matlab.|http://www.sagemath.org|{{Pkg|sage-mathematics}}}}

+

* {{App|[[Wikipedia:Scilab|Scilab]]|Matlab alternative used for numerical computations. Its syntax is not equivalent to that of Matlab, but it can be easily converted.|http://www.scilab.org/|{{AUR|scilab}}}}

==== Statistics ====

==== Statistics ====

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* {{App|[[Wikipedia:ImageJ|ImageJ]]|Java-based image processing and analysing program that provides extensibility via plugins and macros. It is widely used in microscopy (e.g. for cell counting).|http://rsb.info.nih.gov/ij|{{AUR|imagej}}}}

* {{App|[[Wikipedia:ImageJ|ImageJ]]|Java-based image processing and analysing program that provides extensibility via plugins and macros. It is widely used in microscopy (e.g. for cell counting).|http://rsb.info.nih.gov/ij|{{AUR|imagej}}}}

Computer algebra system

Fermat — Computer algebra system that does arithmetic of arbitrarily long integers and fractions, multivariate polynomials, symbolic calculations, matrices over polynomial rings, graphics, and other numerical calculations.

FreeMat — Matlab-like program that supports many of its functions and features a codeless interface to external C, C++, and Fortran code, further parallel distributed algorithm development (via MPI), and 3D visualization capabilities.

Chemistry and biology

Computational biology and bioinformatics

BALL (Biochemical Algorithms Library) — Application framework in C++ that provides an extensive set of data structures as well as classes for molecular nechanics, advanced solvation methods, comparison and analysis of protein structures, file import/export, and visualization.

Quantum ESPRESSO — Integrated suite of applications for electronic-structure calculations and materials modeling at nanoscale. It is based on density-functional theory, plane waves, and pseudopotentials (both norm-conserving and ultrasoft).

Skychart / Cartes du Ciel — Planetarium that maps out and labels most of the constellations, planets, and objects you can see with a telescope. It can also download Digitized Sky Survey Charts and superimpose images over these charts.

KTechLab — IDE for electronic and PIC microcontroller circuit design and simulation featuring an extensive circuit designer with autorouting and simulation of all common electronic components and logic elements.